Transcript
A502HB & A504HB 50 MHz Yagi Antennas Specifications Model: A502HB A504HB Frequency MHz: 50-53 MHz 50-53 MHz Gain: 6.3 dBi 10.8 dBi Power Rating (P.E.P.): 400 W 400 W Impedance (nominal): 50 Ohms 50 Ohms Connector: UHF UHF VSWR (nominal): 1.5:1 1.5:1 Element Phasing: 2 4 Front To Back Ratio: 15 dB 12 dB Boom Length: 2.5 ft. (750mm) 10.66 ft. (3250mm) Longest Element: 9.84 ft. (3000mm) 9.84 ft. (3000mm) Driven Element diameter: Parasitic Elements diameter: Max. Mount diameter: Weight: 3.75 lbs. (1.7 kb) 7.7 lbs. (3.5 kg) Warranty: 1 Year against defects in material or workmanship.
A502HB
A504HB
WARNING Do not install near electrical power lines. Fatal injuries or death may incur if antenna touches electrical power line. Do not tamper with matching network, as this will void all warranty.
Assembly Instructions
red marking
n
brown marking
forward driven element
#050201 (2)
rear driven element
m
#050202 (2)
n
yellow marking
n
orange marking
n
red marking
n
brown marking
#050404 (2)
director #2 director #1
#050403 (2)
forward driven element
n
(1) Remove antenna from package and inspect contents to insure it is complete.
#050401 (2)
rear driven element
n
#050402 (2)
#050405 (4) element clamps
#050204 element fasteners
m #050406 m #050205 element clamps
mounting clamp & hardware
#050410 gamma match assembly
#050207 gamma match assembly
m
n
m
#050203 boom
#050407 boom clamp
m
A502HB Parts List
#050206 mounting clamp & hardware
#050408 element fasteners
n
A504HB Parts List
#050209 boom elements
(2) Loosen element clamp wing nuts on the Boom and adjust into correct mounting position. (A504HB Only ~ Clamp Boom sections together with proper mounting hardware.)
element clamp
boom (A504HB only)
boom boom
(3) Match elements to element clamps with similar color. Fit elements into mounting clamps so element hole fits through clamp extension. When elements are in proper position, tighten wing nut. element element clamp
boom
element clamp extension boom
(4) Install gamma match assembly with red label into position matching red label on boom. Match the hole on Boom with extension on gamma match assembly and fasten wing nut. Do the same to the other side of gamma match assembly. When in place, use zip ties to secure cable on boom. gamma match gamma match rod zip tie boom gamma match cable boom
(5)
gamma match
gamma match rod
boom
Install element fasteners at perforations on gamma match rod. Lightly fasten into position until final tuning adjustment. perforation on gamma match rod
element fastener
(6)
gamma match cable
Install mounting clamp to boom and prepare for installation on mast.
boom
2
Tuning Antenna With quality VSWR meter, check VSWR for proper antenna tuning. If tuning adjustments are required, loosen element fasteners and slide in similar increments until desired center frequency is obtained. Moving element fasteners closer to boom lowers center frequency and moving them away from boom raises center frequency.
Before Final Installation A. Use coax seal to protect both antenna connection and cable connection from weather. B. Spray antenna and mounting hardware with non-conductive acrylic paint to increase the life of antenna and mounting hardware. C. Recommend using removable Loctite Threadlocker #242 or similar product to insure proper fastening of wing nuts.
Nominal VSWR
A502HB
50MHz
51.5MHz
A504HB
53MHz
#050205 element clamp red marking red marking forward driven element
(106.3 inches)
p (17.7 inches)
directivity
(28.5 inches)
(29.5 inches)
(28.5 inches)
(17.7 inches)
(118.1 inches)
n rear driven element
brown marking
#050205 element clamp
3
A502HB
yellow marking director #2
p
#050405 element clamp
(98.4 inches) (55.1 inches)
orange marking
director #1
#050405 element clamp
p boom clamp
#050405 element clamp
(101.6 inches)
(44.3 inches)
red marking
boom (106.3 inches)
element fasteners
red marking
n forward driven element
(11.8 inches)
directivity
(28.5 inches) (29.5 inches)
(28.5 inches)
(22.8 inches)
n
rear driven element
m gamma
match
(118.1 inches)
brown marking
#050405 element clamp
A504HB
WARNING! Any tampering, cutting, or attempted adjustment of this antenna beyond our recommendations may void all warranty. If you have any questions, please call our Customer Service Department at 760-744-0900.
DIAMOND ANTENNA Products are distributed and warranted by RF PARTS COMPANY 435 S. Pacific Street • San Marcos, CA 92078 • (760) 744-0900
www.diamondantenna.net 4
